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タイトルヨミ
コショウ チョウサ ニオケル DGPS ソクイ
日本語以外のタイトル
DGPS Positioning in Lake Surveys
ファイル
言語
日本語
著者
西村 清和
内容記述(抄録等)
Obtaining accurate positions of survey points or lines is essential for the execution of precise lake surveys. Use of GPS (Global Positioning System) has recently become common in lake surveys. However, accuracy is only approximately 100m in automonous (single) GPS positioning using a receiver, and high accuracy positioning cannot be achieved. Therefore, I utilised a differential GPS(DGPS) system, which improved the accuracy of the positioning for lake surveys. This may achieve an accuracy of 1-5 m for static positioning and 3-10 m for moving applications. The DGPS system consists of two sets of GPS receivers (base/fieid units), a low-power UHF radio transmitter and receiver for wireless transmission of DGPS correction data, and a notebook computer. Real-time DGPS and post-processing DGPS can be implemented by combining these components. Following DGPS positioning lake survey was carried out in Lake Nakaumi. The procedure applied was (1) Long distance DGPS positioning between Tsukuba and Daikon-jima Is. (distance of approximately 600km), to evaluate the system. (2) Positioning of a base station at Koshin observatory, located in the center of Lake Nakaumi. (3) Real-time DGPS positioning for setting buoys and markers. (4) Comparison between single GPS and DGPS positioning in the navigation. As a result of these tests, it became clear that DGPS is far superior to single GPS in positioning accuracy.
主題
DGPS
GPS positioning
Lake Nakaumi
lake survey
掲載誌名
Laguna : 汽水域研究
4
開始ページ
39
終了ページ
48
ISSN
21852995
発行日
1997-03
NCID
AN10439529
出版者
島根大学汽水域研究センター
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
研究・学術情報本部 エスチュアリー研究センター
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